The Belgian midfielder has struggled for form and fitness since moving to Old Trafford from Merseyside in a £28m deal in August 2013 and has reportedly been made available by Manchester United manager Louis van Gaal.

Also on Martinez's radar is Matija Nastasic, who is said to have been made available for transfer by Manchester City.

The defender is said to be valued at around £5m and could provide competition in the Toffees' back four. The Serbian missed much of last term through injury but, at just 22, remains highly rated.